What is it about?
This study investigates whether a polyphenol‑rich extract obtained from Cynara cardunculus L. leaves (CCLE), an agricultural byproduct, can improve intestinal epithelial function. Using differentiated Caco‑2 cells as an in vitro intestinal model, researchers evaluated the effects of CCLE on barrier integrity, permeability and epithelial differentiation. Continuous treatment from seeding to full differentiation increased transepithelial electrical resistance (TEER), reduced paracellular permeability to fluorescein and accelerated tight junction reassembly in the Ca²⁺‑switch assay. CCLE also enhanced markers of epithelial differentiation, including alkaline phosphatase activity and tight‑junction protein expression. These beneficial effects were associated with activation of the AMPK pathway.
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Why is it important?
Disruption of the intestinal epithelial barrier contributes to “leaky gut,” a condition implicated in inflammatory bowel diseases, obesity, diabetes and other metabolic disorders. Natural products rich in polyphenols are increasingly studied for their ability to strengthen intestinal barrier function. This work shows that CCLE enhances epithelial integrity and differentiation while promoting AMPK‑related protective pathways. Since Cynara cardunculus leaves are an abundant co‑product of agricultural processing, their valorization into health‑relevant extracts represents a sustainable and potentially cost‑effective strategy.
Perspectives
CCLE emerges as a promising natural product capable of supporting intestinal epithelial health by improving barrier integrity and promoting differentiation. Future research should evaluate its effects in vivo, where the complexity of intestinal physiology—including microbiota, immune interactions and metabolism—could influence outcomes. Understanding which polyphenols contribute most to AMPK activation may also help optimize extraction methods and guide development of functional ingredients aimed at protecting the intestinal barrier in various pathological conditions.
Prof. Antonio Speciale
University of Messina
Read the Original
This page is a summary of: Intestinal epithelial differentiation and barrier function is promoted
in vitro
by a
Cynara cardunculus
L. leaf extract through AMPK pathway activation, Natural Product Research, July 2024, Taylor & Francis,
DOI: 10.1080/14786419.2024.2384080.
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